The mysterious R stars

Robert G. Izzard, C. Simon Jeffery, John Lattanzio

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Abstract

The R stars are a rare class of K-type giant carbon stars. Canonical stellar evolutionary theory cannot explain their existence, yet they have been observed for more than a century. The early-R stars, the warmest in the R class, are enhanced in 12C, 13C and 14N relative to the Sun, but not in s-processes elements or oxygen, and are all single stars. We test the idea that binary mergers lead to the formation of the early-R stars by a comparison of binary population synthesis model results with observations.

Original languageEnglish
Title of host publicationNinth Torino Workshop on Evolution and Nucleosynthesis in AGB Stars and the Second Perugia Workshop on Nuclear Astrophysics
Pages33-37
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2008
Event9th Torino Workshop on Evolution and Nucleosynthesis in AGB Stars and the 2nd Perugia Workshop on Nuclear Astrophysics - Perugia, Italy
Duration: 21 Oct 200727 Oct 2007

Publication series

NameAIP Conference Proceedings
Volume1001
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference9th Torino Workshop on Evolution and Nucleosynthesis in AGB Stars and the 2nd Perugia Workshop on Nuclear Astrophysics
CountryItaly
CityPerugia
Period21/10/0727/10/07

Keywords

  • Binary Stars
  • Carbon Stars
  • Nucleosynthesis
  • R Stars
  • Red Clump
  • Stellar Mergers

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